From: Jens Axboe axboe@kernel.dk
stable inclusion from stable-5.10.65 commit 24fbd77d5a0fd2f22d5a0e8570499302b2dea2be bugzilla: 182361 https://gitee.com/openeuler/kernel/issues/I4EH3U
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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commit 7b3188e7ed54102a5dcc73d07727f41fb528f7c8 upstream.
During some testing, it became evident that using IORING_OP_WRITE doesn't hash buffered writes like the other writes commands do. That's simply an oversight, and can cause performance regressions when doing buffered writes with this command.
Correct that and add the flag, so that buffered writes are correctly hashed when using the non-iovec based write command.
Cc: stable@vger.kernel.org Fixes: 3a6820f2bb8a ("io_uring: add non-vectored read/write commands") Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Chen Jun chenjun102@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com
Signed-off-by: Chen Jun chenjun102@huawei.com --- fs/io_uring.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/fs/io_uring.c b/fs/io_uring.c index 4361ed15e019..0691a09b9c80 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -889,6 +889,7 @@ static const struct io_op_def io_op_defs[] = { }, [IORING_OP_WRITE] = { .needs_file = 1, + .hash_reg_file = 1, .unbound_nonreg_file = 1, .pollout = 1, .async_size = sizeof(struct io_async_rw),